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channelmix: handle stereo to mono

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This commit is contained in:
Wim Taymans 2018-11-07 11:57:19 +01:00
parent 2b88dde567
commit 4d7311aca1
1 changed files with 39 additions and 34 deletions
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73
spa/plugins/audioconvert/channelmix.c
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@ -118,25 +118,26 @@ struct impl {
#define _MASK(ch) (1ULL << SPA_AUDIO_CHANNEL_ ## ch)
#define STEREO (_MASK(FL)|_MASK(FR))
#define FL 0
#define FR 1
#define FC 2
#define LFE 3
#define SL 4
#define SR 5
#define FLC 6
#define FRC 7
#define RC 8
#define RL 9
#define RR 10
#define TC 11
#define TFL 12
#define TFC 13
#define TFR 14
#define TRL 15
#define TRC 16
#define TRR 17
#define NUM_CHAN 18
#define M 0
#define FL 1
#define FR 2
#define FC 3
#define LFE 4
#define SL 5
#define SR 6
#define FLC 7
#define FRC 8
#define RC 9
#define RL 10
#define RR 11
#define TC 12
#define TFL 13
#define TFC 14
#define TFR 15
#define TRL 16
#define TRC 17
#define TRR 18
#define NUM_CHAN 19
#define SQRT3_2 1.22474487139158904909 /* sqrt(3/2) */
@ -182,7 +183,7 @@ static int make_matrix(struct impl *this,
uint32_t dst_chan, uint64_t dst_mask)
{
float matrix[NUM_CHAN][NUM_CHAN] = {{ 0 }};
uint64_t missing;
uint64_t unassigned;
int i, j, matrix_encoding = MATRIX_NORMAL, c;
float clev = M_SQRT1_2;
float slev = M_SQRT1_2;
@ -190,15 +191,15 @@ static int make_matrix(struct impl *this,
float max = 0.0f;
for (i = 0; i < NUM_CHAN; i++) {
if (src_mask & dst_mask & (1ULL << (i + 3)))
if (src_mask & dst_mask & (1ULL << (i + 2)))
matrix[i][i]= 1.0;
}
missing = src_mask & ~dst_mask;
unassigned = src_mask & ~dst_mask;
spa_log_debug(this->log, "missing %08lx", missing);
spa_log_debug(this->log, "unassigned %08lx", unassigned);
if (missing & _MASK(FC)){
if (unassigned & _MASK(FC)){
if ((dst_mask & STEREO) == STEREO){
if(src_mask & STEREO) {
matrix[FL][FC] += clev;
@ -211,8 +212,12 @@ static int make_matrix(struct impl *this,
return -ENOTSUP;
}
if (missing & STEREO){
if (dst_mask & _MASK(FC)) {
if (unassigned & STEREO){
if (dst_mask & _MASK(MONO)) {
matrix[M][FL] += 0.5;
matrix[M][FR] += 0.5;
}
else if (dst_mask & _MASK(FC)) {
matrix[FC][FL] += M_SQRT1_2;
matrix[FC][FR] += M_SQRT1_2;
if (src_mask & _MASK(FC))
@ -221,7 +226,7 @@ static int make_matrix(struct impl *this,
return -ENOTSUP;
}
if (missing & _MASK(RC)) {
if (unassigned & _MASK(RC)) {
if (dst_mask & _MASK(RL)){
matrix[RL][RC] += M_SQRT1_2;
matrix[RR][RC] += M_SQRT1_2;
@ -231,7 +236,7 @@ static int make_matrix(struct impl *this,
} else if(dst_mask & _MASK(FL)) {
if (matrix_encoding == MATRIX_DOLBY ||
matrix_encoding == MATRIX_DPLII) {
if (missing & (_MASK(RL)|_MASK(RR))) {
if (unassigned & (_MASK(RL)|_MASK(RR))) {
matrix[FL][RC] -= slev * M_SQRT1_2;
matrix[FR][RC] += slev * M_SQRT1_2;
} else {
@ -248,7 +253,7 @@ static int make_matrix(struct impl *this,
return -ENOTSUP;
}
if (missing & _MASK(RL)) {
if (unassigned & _MASK(RL)) {
if (dst_mask & _MASK(RC)) {
matrix[RC][RL] += M_SQRT1_2;
matrix[RC][RR] += M_SQRT1_2;
@ -282,7 +287,7 @@ static int make_matrix(struct impl *this,
return -ENOTSUP;
}
if (missing & _MASK(SL)) {
if (unassigned & _MASK(SL)) {
if (dst_mask & _MASK(RL)) {
if (src_mask & _MASK(RL)) {
matrix[RL][SL] += M_SQRT1_2;
@ -316,7 +321,7 @@ static int make_matrix(struct impl *this,
return -ENOTSUP;
}
if (missing & _MASK(FLC)) {
if (unassigned & _MASK(FLC)) {
if (dst_mask & _MASK(FL)) {
matrix[FC][FLC]+= 1.0;
matrix[FC][FRC]+= 1.0;
@ -326,7 +331,7 @@ static int make_matrix(struct impl *this,
} else
return -ENOTSUP;
}
if (missing & _MASK(LFE)) {
if (unassigned & _MASK(LFE)) {
if (dst_mask & _MASK(FC)) {
matrix[FC][LFE] += llev;
} else if (dst_mask & _MASK(FL)) {
@ -339,10 +344,10 @@ static int make_matrix(struct impl *this,
c = 0;
for (i = 0; i < NUM_CHAN; i++) {
float sum = 0.0;
if ((dst_mask & (1UL << (i + 3))) == 0)
if ((dst_mask & (1UL << (i + 2))) == 0)
continue;
for (j = 0; j < NUM_CHAN; j++) {
if ((src_mask & (1UL << (j + 3))) == 0)
if ((src_mask & (1UL << (j + 2))) == 0)
continue;
this->matrix[c++] = matrix[i][j];
sum += fabs(matrix[i][j]);